19-48965340-G-T

Variant names:

• chr19-48965340-G-T
• rs398124635
• NM_000146.4:c.-168G>T

Variant summary

Our verdict is Likely pathogenic. The variant received 9 ACMG points: 10P and 1B. PM2 PP5_Very_Strong BP4

The NM_000146.4(FTL):​c.-168G>T variant causes a 5 prime UTR change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: FTL NM_000146.4 5_prime_UTR
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:5
• Conservation: PhyloP100: 9.53
• Publications: 13 publications found

Genes affected

FTL (HGNC:3999): (ferritin light chain) This gene encodes the light subunit of the ferritin protein. Ferritin is the major intracellular iron storage protein in prokaryotes and eukaryotes. It is composed of 24 subunits of the heavy and light ferritin chains. Variation in ferritin subunit composition may affect the rates of iron uptake and release in different tissues. A major function of ferritin is the storage of iron in a soluble and nontoxic state. Defects in this light chain ferritin gene are associated with several neurodegenerative diseases and hyperferritinemia-cataract syndrome. This gene has multiple pseudogenes. [provided by RefSeq, Jul 2008]

FTL Gene-Disease associations (from GenCC):

• hereditary hyperferritinemia with congenital cataracts

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Genomics England PanelApp, Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae), Orphanet
• neuroferritinopathy

  Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Orphanet
• L-ferritin deficiency

  Inheritance: Unknown, AD Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Orphanet
• genetic hyperferritinemia without iron overload

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000305635 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 9 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 19-48965340-G-T is Pathogenic according to our data. Variant chr19-48965340-G-T is described in ClinVar as Pathogenic. ClinVar VariationId is 16479.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.12). . Strength limited to SUPPORTING due to the PP5.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000146.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FTL	NM_000146.4	MANE Select	c.-168G>T		5_prime_UTR	Exon 1 of 4	NP_000137.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FTL	ENST00000331825.11	TSL:1 MANE Select	c.-168G>T		5_prime_UTR	Exon 1 of 4	ENSP00000366525.2
	FTL	ENST00000853542.1		c.-168G>T		5_prime_UTR	Exon 1 of 4	ENSP00000523601.1
	FTL	ENST00000853538.1		c.-168G>T		5_prime_UTR	Exon 1 of 4	ENSP00000523597.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 4

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
2	-	-	not provided (2)
1	-	-	FTL-related disorder (1)
1	-	-	Hereditary hyperferritinemia with congenital cataracts (1)
1	-	-	Hereditary hyperferritinemia with congenital cataracts;C1853578:Neuroferritinopathy (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.12
CADD	Benign	22
DANN	Benign	0.95
PhyloP100		9.5
PromoterAI		-0.026	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Mutation Taster		=8/292	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs398124635; hg19: chr19-49468597;